KR101079103B1 - Manufacturing method of a copper plate for printing design on a film applied to a panel of home appliances - Google Patents

Abstract

The present invention relates to a method of manufacturing a copper plate, and more particularly, a metal texture or a pearly feeling by printing a design with ink containing metal flakes or pearl on a film attached to a panel attached to an outer surface of a home appliance to form an appearance. It relates to a method of manufacturing a printed copper plate for making it feel.

According to the method for manufacturing a copper plate for printing a film of the present invention, by providing a method for manufacturing a copper plate for printing a design with ink containing metal flakes or pearl on a film attached to a panel attached to an outer surface of a home appliance to form an appearance The film has the effect of simultaneously implementing the color printing layer and the metal texture.

In addition, since the size of the metal flakes contained in the ink can be increased up to 70 μm, the metal texture or pearliness can be further enhanced.

Home appliance, panel, film, gravure printing, metal flake, pearl, copper plate

Description

Manufacturing method of copper plate for printing design on film attached to panel of home appliance {MANUFACTURING METHOD OF A COPPER PLATE FOR PRINTING DESIGN ON A FILM APPLIED TO A PANEL OF HOME APPLIANCES}

The present invention relates to a method for manufacturing a copper plate, and more particularly, a metal texture by printing a design with ink containing metal flakes or pearl on a film attached to a panel attached to an outer surface of a home appliance to form an appearance. Or it relates to a method for producing a printed copper plate for the feeling of pearl.

Conventionally, the exterior of home appliances such as a refrigerator or a washing machine is generally formed by assembling a panel made of synthetic resin. Synthetic resins usually had only one color, but recently, it is required to print a design that causes aesthetics to the appearance of home appliances.

For example, a glass is attached to an outer surface of a door coupled to a front side of a refrigerator or a washing machine, and a product that prints a colorful pattern or a design by using a silk screen printing technique on a rear side of the glass has been released.

It is also printed by injecting metal flakes or pearl into the ink to be printed to give the printed design a metallic texture or pearl feel.

Conventionally, the design is printed directly using the silk screen printing technique on the back of the glass as a technique for printing the design. When the silk screen printing technique is used, arbitrary designs may be printed one by one on one glass panel.

However, the conventional method has a problem that the work process is discontinuous, the work speed is slow and the product defect rate is high, which is not efficient and the production cost is high. In addition, the printed design has a large variation in color, it is difficult to automate production and mass production, and it was not possible to recycle the semi-finished product during the production. In particular, when printing directly on glass, there was a possibility that the glass would be broken during work.

The present invention has been made to solve the above-described conventional problems, by printing the design with ink containing metal flakes or pearl on the film attached to the panel to be attached to the outer surface of the home appliance to form the appearance to feel the metal texture or pearl The purpose of the present invention is to provide a method of manufacturing a printed copper plate to feel the color printing layer and metal texture on the film at the same time.

Copper plate manufacturing method for film printing of the present invention for achieving the above object, the metal is attached to the panel attached to the outer surface of the home appliance to form a color printing layer and the metal texture to simultaneously realize the metal texture on the film In the method of manufacturing a copper plate to gravure printing the design using ink, the cell size (s) of the copper plate is 200 ~ 400㎛, the cell depth (d) of the copper plate is 50 ~ 100㎛, And the thickness (t) of the cell line of the copper plate is characterized in that 10 ~ 50㎛.

In addition, the cell shape of the copper plate is preferably close to the hexagon when viewed from the top.

In addition, the size of the metal flakes or pearl contained in the ink is preferably 10 ~ 70㎛.

In addition, the cell of the copper plate is preferably produced by laser engraving technology.

In addition, the cell of the copper plate is preferably formed through the process of engraving and etching using a laser beam after applying a photosensitive liquid to the surface of the copper-plated cylinder of the iron core.

Moreover, it is preferable to perform chromium plating after the etching of the said copper plate.

According to the method of manufacturing a copper plate for printing a film of the present invention, a method of manufacturing a copper plate for printing a design with ink containing metal flakes or pearl on a film attached to a panel attached to an outer surface of a home appliance to form an appearance By doing so, there is an effect of simultaneously implementing the color printing layer and the metal texture on the film.

In addition, since the size of the metal flakes contained in the ink can be increased up to 70 μm, the metal texture or pearliness can be further enhanced.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to solve the problems of the conventional silk screen printing technique, the present invention is to form a plastic film separately, and gravure printing the design on the film and then laminated and attached to the panel to manufacture a panel for home appliance attachment, in the gravure printing It is related with the manufacturing method of the copper plate used.

First, the film for panel attachment of the household electrical appliance manufactured by gravure printing etc. using the copper plate manufactured by this invention, and its manufacturing process are demonstrated.

1 is a cross-sectional view showing a film produced by laminating a background layer using an adhesive after forming a printing layer by gravure printing on the base layer with a copper plate prepared by the present invention.

As shown in FIG. 1, the film for panel attachment of home appliances manufactured using the copper plate manufactured by this invention is the base material layer 1 formed of transparent synthetic resin, and the printed layer printed on one surface of the said base material layer. (2), an adhesive layer (3) applied on the printing layer and containing metal flakes or pearls, and a background layer formed of opaque synthetic resin to adhere to the adhesive layer and to promote the color of the printing layer ( 4) is made, including.

The base layer 1 is formed of a transparent synthetic resin because the design printed on the back side should be visible. In particular, the base layer 1 is preferably made of polyethylene terephthalate (PET). The substrate layer 1 can be subjected to UV coating to increase scratch resistance and increase the hardness of the film. Moreover, it is preferable that the thickness of the said base material layer 1 is 10-60 micrometers.

And it is preferable that the thickness of the said printing layer 2 is 10-50 micrometers. The print layer 2 is formed by printing several times by dividing each color of the design using a gravure printing technique as described later. When printing with a copper plate manufactured by the present invention, a plurality of metal flakes or pearls having various sizes ranging from 10 μm up to 70 μm may be mixed with the ink to be printed so that the metal flakes or pearls may be included in the printing layer 2. Can be. The flakes are included in the printing layer 2 or the adhesive layer 3 to feel the metal texture. For example, aluminum flakes can be used to express silver texture, and copper flakes can be used as gold. Can express the texture. The pearl is used to express a sparkle feeling like jewelry or mother-of-pearl in addition to the metal texture, and mica or silica may be used.

Even when the size of the metal flakes or pearls is 70 占 퐉, since they are "flakes", the metal flakes or pearls will stick out of the printing layer 2 if the thickness of the metal flakes or pearls is smaller than the thickness of the printing layer 2. Will not. In addition, as described below, the doctor blade 23 is provided at a gravure printing machine 20 shown in FIG. 2 at regular intervals from the printing rollers 22A, 22B, and 22C having copper plates. Since the doctor blade 23 keeps the ink 21A, 21B, and 21C on the printing roller to have a certain thickness, the doctor blade 23 may have its metal flakes or pearls protruding out of the printing layer. The metal flakes or pearls are scraped or pushed into the ink so that the metal flakes or pearls do not protrude out of the printing layer.

The adhesive layer 3 is formed by applying an adhesive having a plurality of metal flakes or pearls mixed on the printing layer 2 to the printing surface of the substrate layer 1. Metal flakes may be mixed in various sizes, but those having a size of 20 to 200 탆 are preferably used. It is preferable that the thickness of an adhesive bond layer is 20-400 micrometers. The metal flakes or pearls contained in this adhesive layer differ only in the range of the size, and the same thing as what is contained in the said print layer can be used.

Finally, the background layer 4 is preferably made of PVC (polyvinyl chloride). The overall color of the film is opaquely colored on the background layer 4, and is prepared by extrusion molding to form a rolled film in a film shape, and then applying an adhesive to the substrate layer 1 on which the design is printed. (4) is laminated with the base material layer (1). This background layer 4 serves to promote the color and metal texture of the print layer 2. Moreover, it is preferable that the thickness of the said background layer 4 is 10-60 micrometers.

After the film according to the present invention is produced, an adhesive is applied to the surface opposite to the printing surface of the base layer 1 and then adhered to glass or a transparent synthetic resin panel. In addition, by applying an adhesive to the surface on the opposite side of the background layer 4 and attaching it to the outer surface of the home appliance, a beautifully printed design can be seen when viewed from the front side of the glass or plastic panel.

Next, using the copper plate prepared according to the present invention, a continuous gravure printing on the base layer, applying an adhesive, and then laminating the background layer to refer to the overall manufacturing process sequence for manufacturing a panel attachment film of home appliances. Will be explained.

Method for producing a film for attaching a transparent panel of a home appliance using the copper plate according to the present invention, forming a base layer (1) from a transparent synthetic resin; Printing a desired design on one surface of the formed substrate layer; Applying an adhesive comprising metal flakes to the printed surface; And laminating a background layer 4 formed of an opaque synthetic resin on the applied adhesive layer 3.

As shown in FIG. 2, first, the base layer 1 (see FIG. 1) is formed in the form of a film to have a predetermined thickness of 10 to 60 μm with transparent synthetic resin, preferably PET, and wound on the roll A 10. .

The roll A 10 thus prepared is mounted on a printing machine for a printing process. The printing step prints the desired design using a gravure printing technique. This gravure printing is one of the intaglio printing methods and is known to be able to express minute shades. This printing technique is mainly used for printing on confectionery bags, plastic bags, and wrapping paper.

In addition, the printing step, it is more preferable that the step of gravure printing a single color on the substrate layer 1 and the step of drying the printed substrate layer is successively plural times. 3 schematically shows a gravure printer 20, and shows the process sequence when printing inks of three colors.

The gravure printing press 20 is provided with three printing presses 20A, 20B, and 20C side by side in order to print respective colors. Each printer is provided so that the lower part of the rotatably mounted printing rollers 22A, 22B, and 22C is immersed in the inks 21A, 21B, and 21C contained in the containers, respectively. In addition, taking the printing machine 20A as an example, the surface of the printing roller 22A serves as a copper plate in which cells of a fine hole shape (100, see FIG. 3) are formed, and when the printing roller 22A is rotated, the cell ( Ink enters the 100 and then ink is printed on the surface of the substrate layer 1 to be printed. That is, the size and arrangement of the cells are predetermined and formed according to the design to be printed.

Each of the inks 21A, 21B, and 21C includes metal flakes or pearls having various sizes in the range of 10 to 70 μm, as described below, so that the metal flakes or pearls are printed together with the gravure printing.

In addition, the upper portion of the printing roller 22A, the PET film unwound from the roll A 10, that is, unwound, is conveyed tightly so as to come into contact with the printing roller 22A, and then the next printing machine 25B through the dryer 25A. A plurality of rollers are arranged to be transported to. In addition, the doctor blade 23 is installed at a predetermined distance from the surface of the printing roller 22A to maintain a constant amount of ink 21A buried on the surface while the printing roller 22A is rotated. have. The dryer 25 is also provided with each dryer (25A, 25B, 25C) for each of the printer (20A, 20B, 20C), it is connected so that the printing process of three colors can be performed continuously. After three successive printing and drying processes, the PET film is wound up on roll B 30 again. Depending on the number of colors of ink to be printed, by installing more or less printers and dryers, the continuous operation can be performed.

Next, in the adhesive application step, it is preferable to apply an adhesive including a metal flake or pearl to the printing surface of the base layer using a comma coating device 40 and then dried in a dryer (45). The coating roller 42 rotatably installed on the upper portion of the comma coating device 40 is installed so that the lower portion of the coating roller 42 is immersed in the adhesive 41 contained in the container. In addition, a blade 43 for adjusting the amount or thickness of the adhesive applied to the film is provided at a predetermined distance from the surface of the coating roller 42.

The roll B 30 on which the film passed through the continuous printing process is wound is brought to the comma coating device 40 and unwinded to one end of the film to be mounted on the comma coating device 40. In the printing press, the film is not submerged in the ink 21, but in the comma coating apparatus 40, the film itself is transferred around the coating roller 42 so as to be submerged in the adhesive 41.

In this coating roller 42, the film coated with adhesive to a certain thickness is transferred to a dryer 45 in which a plurality of rollers are arranged in a row, and during this transfer, the adhesive of the film is dried to form an adhesive layer 3. do.

Finally, the adhesive-coated film is laminated with a PVC film, the adhesive applying step and the laminating step, it is preferably made in succession.

The adhesive coated film is also continuously conveyed by the conveying rollers into the laminating machine 60. The laminating machine 60 is conveyed so that not only the PET film with the design printed and the adhesive applied but also the PVC film unwound from the roll C 50 can enter together. Thus, between the two rotating rollers of the laminating machine 60, the two films are pressed and bonded by an adhesive and then wound on the roll D 70. The film thus wound is preferably cured to be stored for a certain period of time.

In this way, the production of the film for attaching the transparent panel of the home appliance according to the present invention is completed, the film is applied to the transparent panel by applying an adhesive, and then applying the adhesive on the back of the PVC film again, such as It is attached to the outer surface.

The copper plate manufacturing method according to the present invention, as described above, relates to a method for manufacturing a copper plate used when printing an ink containing metal flakes using a gravure printing method on a film attached to a panel attached to a home appliance will be. Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

3 shows a cell formed on a copper plate manufactured by the present invention, (a) is a plan view showing a plurality of cells, and (b) is a cross-sectional view showing two cells.

In the method for manufacturing a copper plate for printing a film of the present invention, as shown in FIG. In the method for manufacturing a copper plate for printing a gravure printing using an ink comprising a, the size (s) of the cell 100 formed on the copper plate is 200 ~ 400㎛, the depth of the cell 100 formed on the copper plate ( d) is 50-100 μm, and the thickness t of the cell line formed on the copper plate is 10-50 μm. In addition, the cell shape of the copper plate is preferably close to the hexagon when viewed from the top.

The size s of the cell 100 formed on the copper plate is defined as the diameter of the cell 100 when the shape of the cell is circular in plan view, but the shape of the cell is a regular hexagon as shown in FIG. Is defined as the distance between two sides facing each other. As shown in FIG. 3B, the depth d of the cell 100 is defined as the depth to the deepest part of the cell, that is, the maximum depth. The side walls and the bottom surface of the cell 100 are not straight, as shown in FIG. 3 (b), but rather form a curved surface in which such straight lines are connected by a smooth curve since etching is usually performed after engraving with a laser beam. The cell 100 line forms a boundary line between one cell and another adjacent cell, and the thickness t is in a range of 10 to 50 μm.

When the shape of the cell 100 is close to a hexagon, each cell may be arranged at the same interval as the other adjacent six cells, that is, at the same interval with the cell lines 10 to 50 μm thick as described above. Can be. Therefore, since the arrangement of the cells can be made more uniform than in the case of having other shapes, the quality of gravure printing can be further improved.

In addition, the cross section of the cell 100 shown in 3 (b) has an pentagonal shape of an opening surface, two vertical side surfaces, and two lower inclined surfaces. When etching after copper plate processing with a laser beam, it will not form an accurate pentagon as shown, but will form a concave curved surface close to the pentagon. The lower sloped surface may form a concave curved surface. When the cross section of the cell is formed close to the pentagon, the quality of the gravure printing is higher because the amount of ink printed by one cell does not occur much at the center and the edge of the cell than when forming a triangle. Can be good. In addition, as described later, a relatively large metal flake can be accommodated, thereby improving the metal texture.

Since the size s of the cell 100 is in the range of 200 to 400 μm and the depth d of the cell 100 is in the range of 50 to 100 μm, the size s of the cell 100 is the depth of the cell 100. 2 to 8 times larger than (d). The thickness t of the cell 100 line may be thinner as long as the cell 100 has strength enough to temporarily receive ink and perform gravure printing, but it may be difficult to process the thinner to less than 10 μm. If the thickness (t) of the cell 100 line exceeds 50 μm, the cell line is visible to the naked eye after printing, so the maximum is 50 μm.

In addition, the size of the metal flake or pearl contained in the ink 22A, 22B, 22C is preferably 10 ~ 70㎛. As such, the metal flakes or pearls that are temporarily contained in the ink for gravure printing and temporarily enter the cell 100 may include up to 70 μm in size. In such a case, even if the depth d of the cell 100 is formed to a minimum value of 50 μm, the thickness 100 of the cell 100 is 200 μm or more and the thickness is 40 because the metal flake or pearl is in the form of flakes. Since it does not exceed μm, the largest metal flake or perl can be accommodated in the cell 100.

In addition, although the cell of the said copper plate can also be produced using a film corrosion making technique or an electronic engraving making technique, it is preferable to manufacture by the laser making technique.

The film corrosion forming technology is a method of developing a film after applying a photoresist to a copper-plated cylinder is a high productivity production method. In the case of film corrosion, since it is difficult to process a cell having exactly the desired dimensions and shapes, there is no suitable surface for processing the cell shape of the copper plate required by the present invention.

The electronic engraving making technology is one of the engraving methods for forming a gravure dot for printing by directly engraving a copper surface using a diamond stylus of an electronic engraving machine, and is excellent in reproducibility of color printed matter. However, in the case of electron engraving, since the cell is directly engraved on the copper plate using a micro niddle, the cross-sectional shape of the cell is formed close to the inverted triangle. Therefore, even when the metal flakes having the same dimensions are formed into a pentagonal shape having a vertical sidewall, the maximum size of the metal flakes that can enter the cell is inevitably reduced.

Laser engraving technology according to the present invention is a preferred method that takes only the advantages of the corrosive plate and electronic engraving plate of the gravure printing method, the process of engraving and etching using a laser beam after applying a photosensitive liquid to the surface of the copper-plated cylinder on the iron core The copper plate in which the some cell is formed is produced through. In the laser engraving process, there are no problems such as mismatches in the joints of the continuous pattern generated in the film corrosion process, poor plate making due to fine dust, poor focus due to shrinkage of the film for making, and color mismatch. In addition, laser engraving can form microscopic dots to express the delicate and diverse colors allowed by gravure printing inks.

Moreover, it is preferable to perform chromium plating after the etching of the said copper plate. As described above, the plating of the copper plate on which the cells are formed may improve the durability of the copper plate.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited only to this specific embodiment, and those skilled in the art are appropriately within the scope described in the claims of the present invention. Changes will be possible.

1 is a cross-sectional view showing a film manufactured by laminating a background layer using an adhesive after forming a printing layer by gravure printing on a base layer with a copper plate manufactured by the present invention.

FIG. 2 is a view illustrating a process of continuously performing gravure printing on a copper plate manufactured according to the present invention, and schematically illustrating an overall manufacturing process sequence of a film for panel attachment of a home appliance.

3 shows a cell formed on a copper plate manufactured by the present invention, (a) is a plan view showing a plurality of cells, and (b) is a cross-sectional view showing two cells.

<Description of the symbols for the main parts of the drawings>

1: substrate layer

2: printing layer

3: adhesive layer

4: background layer

10: Roll A

20: gravure printing machine

21A, 21B, 21C: Ink

22A, 22B, 22C: Printing Roller

23: Doctor Blade

25: dryer

30: Roll B

40: comma coating device

45: dryer

50: Roll C

60: laminating machine

70: Roll D

100: cell

s: the size of the cell

d: maximum depth of cell

t: thickness of the cell line

Claims (6)

Manufacture of copper plate gravure printing using ink containing metal flakes or pearl to simultaneously realize color printing layer and metal texture on film attached to panel which is attached to outer surface of home appliance to form exterior In the method, The cell size (s) of the copper plate is 200 ~ 400㎛, The cell depth d of the copper plate is 50-100 μm, and The thickness t of the cell line of the copper plate is 10 to 50㎛ manufacturing method of the copper plate. The method of claim 1, The cell shape of the copper plate is a manufacturing method of the copper plate, characterized in that the hexagonal shape when viewed from the top. The method of claim 2, The size of the metal flakes or pearl contained in the ink is a manufacturing method of the copper plate, characterized in that 10 ~ 70㎛. The method according to any one of claims 1 to 3, The cell of the copper plate is manufactured by laser engraving technology. 5. The method of claim 4, The cell of the copper plate is formed by applying a photosensitive liquid to the surface of the copper-plated cylinder on the iron core and then engraving and etching using a laser beam. The method of claim 5, A method for producing a copper plate, characterized in that the plating of the copper plate after the etching of the copper plate.

Images